﻿
function alertWin(title, msg, w, h) {

    var titleheight = "22px"; // 提示窗口标题高度 
    var bordercolor = "#666699"; // 提示窗口的边框颜色 
    var titlecolor = "#FFFFFF"; // 提示窗口的标题颜色 
    var titlebgcolor = "#666699"; // 提示窗口的标题背景色
    var bgcolor = "#FFFFFF"; // 提示内容的背景色

    var iWidth = document.documentElement.clientWidth; // 弹出前浏览器窗口的宽;
    var iHeight = document.documentElement.clientHeight; // 弹出前浏览器窗口的高; 

    var bgObj = document.createElement("div"); // 遮罩层;
    bgObj.style.cssText = "position:absolute;left:0px;top:0px;width:" + iWidth + "px;height:" + Math.max(document.body.clientHeight, iHeight) + "px;filter:Alpha(Opacity=30);opacity:0.3;background-color:#000000;z-index:101;";
    document.body.appendChild(bgObj);

    var msgObj = document.createElement("div"); // 弹窗;
    msgObj.style.cssText = "position:absolute;font:12px '宋体';top:" + (iHeight - h) / 2 + "px;left:" + (iWidth - w) / 2 + "px;width:" + w + "px;height:" + h + "px;text-align:center;border:1px solid " + bordercolor + ";background-color:" + bgcolor + ";padding:1px;line-height:22px;z-index:102;";
    document.body.appendChild(msgObj);

    var table = document.createElement("table"); // 内容;
    msgObj.appendChild(table);
    table.style.cssText = "margin:0px;border:0px;padding:0px;";
    table.cellSpacing = 0;

    // 标题;
    var tr = table.insertRow(-1);  // "-1"是默认参数，默认增加行到表格最后一行;
    var titleBar = tr.insertCell(-1);
    titleBar.style.cssText = "width:100%;height:" + titleheight + "px;text-align:left;padding:3px;margin:0px;font:bold 13px '宋体';color:" + titlecolor + ";border:1px solid " + bordercolor + ";cursor:move;background-color:" + titlebgcolor;
    titleBar.style.paddingLeft = "10px";
    titleBar.innerHTML = title;

    // 移动相关;
    var moveX = 0;
    var moveY = 0;
    var moveTop = 0;
    var moveLeft = 0;
    var moveable = false;
    var docMouseMoveEvent = document.onmousemove;
    var docMouseUpEvent = document.onmouseup;
    titleBar.onmousedown = function () {
        var evt = getEvent();
        moveable = true;
        moveX = evt.clientX;
        moveY = evt.clientY;
        moveTop = parseInt(msgObj.style.top);
        moveLeft = parseInt(msgObj.style.left);

        document.onmousemove = function () {
            if (moveable) {
                var evt = getEvent();
                var x = moveLeft + evt.clientX - moveX;
                var y = moveTop + evt.clientY - moveY;
                if (x > 0 && (x + w < iWidth) && y > 0 && (y + h < iHeight)) {
                    msgObj.style.left = x + "px";
                    msgObj.style.top = y + "px";
                }
            }
        };
        document.onmouseup = function () {
            if (moveable) {
                document.onmousemove = docMouseMoveEvent;
                document.onmouseup = docMouseUpEvent;
                moveable = false;
                moveX = 0;
                moveY = 0;
                moveTop = 0;
                moveLeft = 0;
            }
        };
    }

    function close() {
        //alert("即将关闭");
        document.body.removeChild(bgObj);
        document.body.removeChild(msgObj);
    }

    var closeBtn = tr.insertCell(-1); // 关闭按钮;
    closeBtn.style.cssText = "cursor:pointer; padding:2px;background-color:" + titlebgcolor;
    closeBtn.innerHTML = "<span style='font-size:15pt; color:" + titlecolor + ";'>×</span>";
    closeBtn.onclick = close;

    // 内容赋值;
    var msgBox = table.insertRow(-1).insertCell(-1);
    msgBox.style.cssText = "font:10pt '宋体'; padding:4px;";
    msgBox.colSpan = 2;
    msgBox.innerHTML = msg;

    // 确定按钮 by dlgcy 20150502;
    var okArea = document.createElement("div");
    var needMarginTop = h - table.offsetHeight - 25; // 使用offsetHeight获得元素高度，25是此div本身的估算高度;
    //var needMarginTop = 25;
    okArea.style.cssText = 'text-align:center; margin-top:' + needMarginTop + 'px;';
    var okBtn = '<input type="button" value="确定" />';
    okArea.innerHTML = okBtn;
    okArea.onclick = close;
    msgObj.appendChild(okArea);

    // 获得事件Event对象，用于兼容IE和FireFox
    function getEvent() {
        return window.event || arguments.callee.caller.arguments[0];
    }
}
